[M] Change in coreboot[master]: mb/google/dedede: Support variant specific power limits

[Reka Norman (Code Review)]

Attention is currently required from: ChiaLing, Paul Menzel, Reka Norman, Ryan Lin, Zhuohao Lee.

Reka Norman has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75396?usp=email )

Change subject: mb/google/dedede: Support variant specific power limits
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Patch Set 11:

(2 comments)

File src/mainboard/google/dedede/variants/baseboard/ramstage.c:

https://review.coreboot.org/c/coreboot/+/75396/comment/0de791d1_0208e908 :
PS10, Line 134:
> Pl4 will be 60w. It updated on CB:75395.

On brask, we set PL4 to the same value as psyspl2 for Type-C, i.e. limit it to 97% of the charger rating. Do we need to do the same here? Currently PL4 will currently exceed the charger rating for 45W chargers.

File src/mainboard/google/dedede/variants/baseboard/ramstage.c:

https://review.coreboot.org/c/coreboot/+/75396/comment/a540a3c8_6464539b :
PS11, Line 106: psyspl1, 
not used